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(B) The products of the reaction of copper with $HNO_{3}$ depend upon the concentration of $HNO_{3}$ used.Copper metal reacts with dilute $HNO_{3}$ to

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$NO$ and $NO_{2}$

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(B) The products of the reaction of copper with $HNO_{3}$ depend upon the concentration of $HNO_{3}$ used.Copper metal reacts with dilute $HNO_{3}$ to form nitrogen $(II)$ oxide $(NO)$:$3Cu + 8HNO_{3} 	ext{ (dil.)} ightarrow 3Cu(NO_{3})_{2} + 2NO + 4H_{2}O$Copper metal reacts with concentrated $HNO_{3}$ to form nitrogen $(IV)$ oxide or nitrogen dioxide $(NO_{2})$:$Cu + 4HNO_{3} 	ext{ (conc.)} ightarrow Cu(NO_{3})_{2} + 2NO_{2} + 2H_{2}O$Thus,depending on the concentration,both $NO$ and $NO_{2}$ can be obtained.

Which of the following products will be obtained when copper metal is reacted with $HNO_{3}$?

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